牙科包埋材料快速鑄鈦之研究

Commercial Dental Investments for Accelerated Titanium Casting

10.30096/CSMJ.200606.0006

燕敏(Min Yan)；黃翠賢(Tsui-Hsien Huang)；周明勇(Ming-Yung Chou)

鈦金屬 ； 牙科包埋材 ； 快速鑄造技術 ； 齒科鑄造 ； Titanium ； Dental investment ； Accelerated casting technique ； Dental casting

中山醫學雜誌

17卷1期（2006 / 06 / 01）

53 - 61

繁體中文

The purpose of this study was to investigate the possible use of an accelerated casting technique to cast titanium. Two commercial investments, Rematitan Plus and Tancovest, were used to examine the results of using such accelerated casting techniques expansion setting, thermal expansion and compression strength. We also measured dimensional accuracy and surface roughness of the titanium castings. We found that residual thermal expansion of the investments at the casting temperature ranged between 0.39% and 0.64%, green strengths ranged between 4.4 and 10.3MPa and the fired strengths between 13.8 to 17.6MPa. The dimensional accuracies of castings made with the accelerated casting technique were approximately -0.57%. The surface roughness (Ra) of the castings ranged from 1.91 to 3.10μm. The heating method did not significantly influence the accuracy and the surface roughness of the titanium castings (P＞0.05). These results suggest that these commercial investments can be used for the accelerated casting of titanium.

The purpose of this study was to investigate the possible use of an accelerated casting technique to cast titanium. Two commercial investments, Rematitan Plus and Tancovest, were used to examine the results of using such accelerated casting techniques expansion setting, thermal expansion and compression strength. We also measured dimensional accuracy and surface roughness of the titanium castings. We found that residual thermal expansion of the investments at the casting temperature ranged between 0.39% and 0.64%, green strengths ranged between 4.4 and 10.3MPa and the fired strengths between 13.8 to 17.6MPa. The dimensional accuracies of castings made with the accelerated casting technique were approximately -0.57%. The surface roughness (Ra) of the castings ranged from 1.91 to 3.10μm. The heating method did not significantly influence the accuracy and the surface roughness of the titanium castings (P＞0.05). These results suggest that these commercial investments can be used for the accelerated casting of titanium.